The Master is plotting against the Doctor, yapping about after centuries of conflict between them, the Doctor's certain death is now certain. The Master has set a deadly trap in the Doctor's own TARDIS. The Doctor lets the Master know that he has heard these plans. The Master switches off the video but the Doctor overhears the next plan: some evil death on Planet Zeston Four. The Doctor calmly tells him he has overheard that, too. Anyway, he wants to tell the Master something on the planet Terserus. On this planet, the life forms communicate by modulating gastric emissions.

The Master is the one who falls into a trap door. The Doctor anticipated the Master's bribe and went back to the architect in the past and gave him dinner first. The Doctor is very calm about all of it. The pair are about to leave but the Master, older, after 312 years of climbing out, confronts them. The Doctor calmly asks him if he is going to his terrible revenge thingie. The Daleks are with the Master now; the only ones who would work with him since they do not have noses and the Master has spent 312 years in the sewers. The Daleks have also augmented the Master's body with superior Dalek technology -- a sucker in his hand which Emma suspects the Master doesn't know how to use.

The Master comes at the Doctor, "Die, Doctor, die!" The Doctor moves aside with Emma so that the Master falls into the sewer again. The Doctor winks. The Master, older and with longer white hair, returns 624 years later after climbing out again. The Doctor and Emma run and the Daleks and the Master give chase. A Dalek inadvertently knocks the Master back into the sewer! It is 936 years later and the Master uses a walker, "Wait for me! Wait for me!"

The Doctor and Emma are tied up and the Doctor keeps telling a questioning Emma, "I'll explain later." She wanted to know why the Daleks didn't kill him... why they changed their mind and tied him up instead. The Master is back again and rejuvenated to his younger looking self and, the Doctor notices, affixed with breasts...Daleks bumps which detect orin charged emissions and have locator beam locators. He is also helping the Daleks perfect the zetronic beam and they will use it which will give them the whole universe in five minutes... the Doctor calmly explains. Emma asks the Daleks why they have chairs on a Dalek ship. They tell her they will explain later.

The next Doctor explains he is sorry but he is cute, handsome, and a lick in the mirror; conceited. He calls the Master the camp one and says, "Nice tits."   The Daleks ask for the Doctor's help. He thinks this is a great way to start out by saving his oldest foes. He kisses Emma, who can live with this new handsome persona. He tells her to get champagne out of the TARDIS. He thinks he will particularly good at rewiring. He isn't. A massive shock and blast floors him.

The Doctor regenerates into a shy Doctor: he is shy of girls and won't look at Emma and won't face her eye to eye. He skips about a bit and looks older with less hair. He will not stare the Master eye to eye. He goes off into another room and a there is a blast. A new Doctor emerges from after this blast. He should have unplugged first. Emma looks pleased at this very handsome Doctor. Dual energy is blasted around the room and floors the Doctor, hitting him in the back. He falls. The Master tells Emma that he cannot regenerate now...the pure zatronic energy robbed him of his regenerative powers. The Doctor dies saying, "I'll explain..."

Emma tells the Doctor he cannot die -- he's too brave, too kind, too silly. He is like Father Christmas, The Wizard of Oz, Scooby Doo. The Master calls him the best and bravest of all foes. The Master renounces evil. So do the Daleks who will honor the Doctor, their former foe. Emma says the Doctor has never been cruel and was never cowardly. It will never be safe to be scared again.